register defs and uses after each successful coalescing.
- Also removed a number of hacks and fixed some subtle kill information bugs.

llvm-svn: 47167

machine instr will change its definition register.

llvm-svn: 47166

llvm-svn: 47164

with a hard-coded operand number.

llvm-svn: 47163

that doesn't support it.  Per Chris.

llvm-svn: 47162

llvm-svn: 47161

llvm-svn: 47150

llvm-svn: 47149

llvm-svn: 47148

it follows the order of the enum, not alphabetical.
The motivation is to make -mattr=+ssse3,+sse41
select SSE41 as it ought to.  Added "ignored"
enum values of 0 to PPC and SPU to avoid compiler
warnings.

llvm-svn: 47143

Fixes PR 2030.

llvm-svn: 47141

being consistent with the rest of the APInt implementation.

llvm-svn: 47138

llvm-svn: 47129

llvm-svn: 47128

which allows us to kill a target-specific node.

llvm-svn: 47127

the return value is zero-extended if it isn't
sign-extended.  It may also be any-extended.
Also, if a floating point value was returned
in a larger floating point type, pass 1 as the
second operand to FP_ROUND, which tells it
that all the precision is in the original type.
I think this is right but I could be wrong.
Finally, when doing libcalls, set isZExt on
a parameter if it is "unsigned".  Currently
isSExt is set when signed, and nothing is
set otherwise.  This should be right for all
calls to standard library routines.

llvm-svn: 47122

1) ConstantFP is now expand by default
2) ConstantFP is not turned into TargetConstantFP during Legalize
   if it is legal.

This allows ConstantFP to be handled like Constant, allowing for 
targets that can encode FP immediates as MachineOperands.

As a bonus, fix up Itanium FP constants, which now correctly match,
and match more constants!  Hooray.

llvm-svn: 47121

FP Immediates, crazily enough

llvm-svn: 47117

llvm-svn: 47116

llvm-svn: 47115

llvm-svn: 47111

llvm-svn: 47109

llvm-svn: 47108

llvm-svn: 47107

llvm-svn: 47106

llvm-svn: 47101

size. Initialize these APInts to properly-sized zero values.

llvm-svn: 47099

llvm-svn: 47098

to pass the mask APInt by value, not by reference. 

llvm-svn: 47096

llvm-svn: 47093

actually does.

llvm-svn: 47090

llvm-svn: 47089

llvm-svn: 47086

llvm-svn: 47082

llvm-svn: 47079

CTTZ and CTPOP.  The expansion code differs from
that in LegalizeDAG in that it chooses to take the
CTLZ/CTTZ count from the Hi/Lo part depending on
whether the Hi/Lo value is zero, not on whether
CTLZ/CTTZ of Hi/Lo returned 32 (or whatever the
width of the type is) for it.  I made this change
because the optimizers may well know that Hi/Lo
is zero and exploit it.  The promotion code for
CTTZ also differs from that in LegalizeDAG: it
uses an "or" to get the right result when the
original value is zero, rather than using a compare
and select.  This also means the value doesn't
need to be zero extended.

llvm-svn: 47075

llvm-svn: 47067

llvm-svn: 47066

llvm-svn: 47065

llvm-svn: 47062